I think that arguments about proportionality are entirely pointless. You're not even arguing that the content is bad then. You're arguing about a ratio, literally.
Er...yes. I'm pointing out that disproportionately subjecting female characters to violence is bad. I'm not sure why pointing out that singling out one group for worse treatment is bad should be a problem to you. This isn't even feminist theory, this is common sense.
For example, I don't give Borderlands 2 crap and objected to its inclusion in the video because it's obvious from playing the game that gender is irrelevant to what events happen to what characters. Then again, Anthony Burch is pretty open about thinking of feminist issues in his writing, and he wrote Borderlands (he also critiqued Ico on HAWP a while back.)
Ironically, Tomb Raider (loved it) is exactly that and everyone tried to trash it and say it was sexist.
1) That criticism was from before the game came out and was largely based on some very poor marketing choices.
2) That criticism evaporated when the game actually came out.
1) happened because, as I pointed out, the significantly higher amount of titles that use violence against women to propel their MacGuffin plots is what got people worried that Tomb Raider was taking the same route.
Proportion matters. It establishes a pattern and when we can find a pattern of media utilizing female characters simply as Corpse MacGuffins, it does stand to reason that reducing EVERY significant female character to a Corpse MacGuffin is harmful.
Being offended by a ratio is pointless. These are market driven decisions.
Oh, good, we can just blame the invisible hand of the market for bad writing.